BMW i4 2024 — technical service bulletin
Bulletin B170124 · NHTSA communication 11014035 · issued Feb 3, 2025
Technical service bulletin
communication type
Engine
component
2024
model years
4
vehicle entries
Official summary
There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high-voltage battery unit: Undervoltage or internalcommunication fault 8049AA - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedisconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedis
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.